Anyone help me with component ID for X5DIJ-SX039C laptop (k5

C

Chris from London

Guest
Went to try to fix my daughters ASUS laptop and made it much worse :)
She did not have her power supply so I used mine - I have an ASUS netbook. The plug was not the same but the VA are so I rigged up what I thought was the correct one but when I plugged it in it would not light the "PSU connected light". Although the laptop worked, without a charger it was no use.

As it was working before I got my hands on it I assume my connector somehow caused the PSU circuit to blow. The DC Jack goes to a plug on the mobo and I tested it in situ - there was 19v at the mobo socket, so the prob is further down the line.

I had to take the laptop completely apart to get at the mobo components to test points, and cannot easily re-connect everything to test the whole. I stripped it down and sure enough there is a burnt-out component - looks like a SM cap (MLCC) but cannot be 100% certain due to ignorance.

The mobo is an asus k501j

Found the schematic (https://googledrive.com/host/0ByM1ELG0t6mgZlJsRmRZcXhSVWM/pub/asus_k40ij_k50ij_rev_1.1_sch.pdf although it is for rev 1.1 and my board is rev 2.1) so have extracted the PSU Section and added it to the photo.

It looks as if the burnt one is an MLCC - a capacitor but, as I am not sure I have got the right schematic and cannot trace the wiring on the board itself (it is too thick) I guess I can only go ahead and replace it and hope for the best.

Can I test the mobo with nothing apart from power or do I need to reassemble? Can I simply remove the component and see if the laptop works without it? There could be a further fault. Presumably I do not need a MLCC - a regular cap would do it provided it is rated at 25v? Thought I could maybe try to find one on an old computer board as it looks like you cannot easily buy just one MLCC.

Hers a photo of the mobo showing the component and the schematic:
http://i989.photobucket.com/albums/af18/zeus_1066/domtech/laptop/asus-k501j-burnt-out-schemtoo_zps3829aba0.png

Here is a bigger pic of just the mobo:
http://i989.photobucket.com/albums/af18/zeus_1066/domtech/laptop/k501jmoborear_zps25b04b6d.jpg

Any help gratefully appreciated.
 
"Chris from London"


Hers a photo of the mobo showing the component
and the schematic:

http://i989.photobucket.com/albums/af18/zeus_1066/domtech/laptop/asus-k501j-burnt-out-schemtoo_zps3829aba0.png
Click to expand...

** What I see your arrow pointing at is a burnt looking SMD tantalum cap
(C6802) and immediately to it's left a missing part - Schottky diode
(D6801). The cap further to the left is an MLCC.

With reverse polarity at the DC jack, the diode would heat, melt the solder
and fall off the PCB - then the tantalum cops reverse voltage and
explodes.

I strongly suspect there is other damage too.



..... Phil
 
On Sun, 19 Jan 2014 16:27:11 -0800 (PST), Chris from London
<techt@setzweb.com> wrote:

>Went to try to fix my daughters ASUS laptop and made it much worse :)

Welcome to Learn by Destroying(tm).

She did not have her power supply so I used mine - I have an ASUS netbook.
The plug was not the same but the VA are
Click to expand...

It's not the power (VA) that needs to be the same. It's the polarity,
voltage, and current rating. The polarity and voltage need to be
exact. The current rating can be higher.

so I rigged up what I thought
was the correct one but when I plugged it in it would not light the
"PSU connected light". Although the laptop worked, without a charger
it was no use.
Click to expand...

So, just buy the correct charger and try it.

As it was working before I got my hands on it I assume my connector
somehow caused the PSU circuit to blow. The DC Jack goes to a plug
on the mobo and I tested it in situ - there was 19v at the mobo socket,
so the prob is further down the line.
Click to expand...

Offhand, I would guess that you applied reverse power. Please check
and compare the polarity markings on the laptop serial number tag and
the charger.

Here's a photo of the mobo showing the component and the schematic:
http://i989.photobucket.com/albums/af18/zeus_1066/domtech/laptop/asus-k501j-burnt-out-schemtoo_zps3829aba0.png
Click to expand...

I took the liberty of expanding your photo so I could see the
components.
<http://www.learnbydestroying.com/jeffl/crud/asus-k501j.jpg>
The "hole" in the burnt out component is characteristic of applying
reverse polarity to an active device such as a diode. I would guess
that the diode exploded, blowing the top off the epoxy package.

As Phil notes, there could be other damage. I think this is going to
be an uphill battle and a difficult fix. Good luck.

--
Jeff Liebermann jeffl@cruzio.com
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558
 
> A diode is not an active device

It was pretty active there for a second.
 
In article <v22pd9hm1r5br9004o4o22dg4052p3tcdm@4ax.com>, Jeff Liebermann
<jeffl@cruzio.com> writes

http://www.learnbydestroying.com/jeffl/crud/asus-k501j.jpg
The "hole" in the burnt out component is characteristic of applying
reverse polarity to an active device such as a diode. I would guess
that the diode exploded, blowing the top off the epoxy package.
Click to expand...

The 8-pin IC next to it also looks burnt.

To the OP: forget it, this is not economically repairable. Buy your
daughter a new machine and use the correct charger in future.

--
(\_/)
(='.'=)
(")_(")
 
On 01/21/2014 07:24 AM, Mike Tomlinson wrote:
In article <v22pd9hm1r5br9004o4o22dg4052p3tcdm@4ax.com>, Jeff Liebermann
jeffl@cruzio.com> writes

http://www.learnbydestroying.com/jeffl/crud/asus-k501j.jpg
The "hole" in the burnt out component is characteristic of applying
reverse polarity to an active device such as a diode. I would guess
that the diode exploded, blowing the top off the epoxy package.

The 8-pin IC next to it also looks burnt.

To the OP: forget it, this is not economically repairable. Buy your
daughter a new machine and use the correct charger in future.
Click to expand...

A diode is not an active device
 
In article <b1bd46bc-bcf2-4c9f-9568-38ef4a0e705d@googlegroups.com>,
jurb6006@gmail.com writes
A diode is not an active device

It was pretty active there for a second.
Click to expand...

Heh. Probably sacrificed itself to protect the fuse.

--
(\_/)
(='.'=)
(")_(")
 
dave wrote:
On 01/21/2014 07:24 AM, Mike Tomlinson wrote:
In article <v22pd9hm1r5br9004o4o22dg4052p3tcdm@4ax.com>, Jeff Liebermann
jeffl@cruzio.com> writes

http://www.learnbydestroying.com/jeffl/crud/asus-k501j.jpg
The "hole" in the burnt out component is characteristic of applying
reverse polarity to an active device such as a diode. I would guess
that the diode exploded, blowing the top off the epoxy package.

The 8-pin IC next to it also looks burnt.

To the OP: forget it, this is not economically repairable. Buy your
daughter a new machine and use the correct charger in future.


A diode is not an active device.
Click to expand...

Then explain the Gunn Diode. DC in, RF out. How about LEDs? DC in,
Photons out.


--
Anyone wanting to run for any political office in the US should have to
have a DD214, and a honorable discharge.
 
>"Then explain the Gunn Diode. DC in, RF out.

Also the tunnel diode.
 
On 01/21/2014 03:04 PM, Michael A. Terrell wrote:
dave wrote:

On 01/21/2014 07:24 AM, Mike Tomlinson wrote:
In article <v22pd9hm1r5br9004o4o22dg4052p3tcdm@4ax.com>, Jeff Liebermann
jeffl@cruzio.com> writes

http://www.learnbydestroying.com/jeffl/crud/asus-k501j.jpg
The "hole" in the burnt out component is characteristic of applying
reverse polarity to an active device such as a diode. I would guess
that the diode exploded, blowing the top off the epoxy package.

The 8-pin IC next to it also looks burnt.

To the OP: forget it, this is not economically repairable. Buy your
daughter a new machine and use the correct charger in future.


A diode is not an active device.


Then explain the Gunn Diode. DC in, RF out. How about LEDs? DC in,
Photons out.
Click to expand...

An active device is any type of circuit component with the ability to
electrically control electron flow (electricity controlling
electricity). In order for a circuit to be properly called electronic,
it must contain at least one active device. Components incapable of
controlling current by means of another electrical signal are called
passive devices. Resistors, capacitors, inductors, transformers, and
even diodes are all considered passive devices.

http://www.allaboutcircuits.com/vol_3/chpt_1/2.html
 
"dave"

A diode is not an active device.
Click to expand...

** Most sources say it is classed as one.

Then explain the Gunn Diode. DC in, RF out. How about LEDs? DC in,
Photons out.


http://www.allaboutcircuits.com/vol_3/chpt_1/2.html
Click to expand...

** And Wiki says otherwise:

http://en.wikipedia.org/wiki/Electronic_component


Semiconductors and vacuum tubes are automatically "active devices".

So that includes solid state and vacuum diodes too.



..... Phil
 
"Phil Allison" wrote in message news:bkb5slFclr1U1@mid.individual.net...

** And Wiki says otherwise:
http://en.wikipedia.org/wiki/Electronic_component

Wikipedia is wrong.
 
On Wed, 22 Jan 2014, etpm@whidbey.com wrote:

On Wed, 22 Jan 2014 17:17:41 -0800, "William Sommerwerck"
grizzledgeezer@comcast.net> wrote:

"Phil Allison" wrote in message news:bkb5slFclr1U1@mid.individual.net...

** And Wiki says otherwise:
http://en.wikipedia.org/wiki/Electronic_component

Wikipedia is wrong.
In 2013 Wikipedia was compared to a major printed encyclopedia (I
don't remember which right now) and the percentage of errors was
pretty much the same for both. This is not to say that the errors were
the same or on the same subject or in any other way related except
that they were errors. The point is that they both contain errors. So
William could indeed be correct when he says that Wikipedia is wrong.
If that is truly the case then I think it would be a good thing if he
corrected the Wikipedia article and used references to back up the
correction. I really appreciate all the time folks have spent, and
continue to spend, on entries to Wikipedia. It is obvious that many
people have spent many hours researching, documenting, and writing for
Wikipedia and all this effort is unpaid. Since I have so far not been
able to contribute any information to Wikipedia my only recourse has
been to contribut cash. I hope William has the time and inclination to
correct the errors he has seen on this subject in Wikipedia.
Eric

But wikipedia is for everyone.
Click to expand...

The fact that someone doesn't know anything doesn't matter. They read a
book or see a movie, and then start an entry for it. They aren't allowed
to "create the facts" themselves, they have to have references. I've seen
entries that are like short versions of books, people able to point to the
bit in the book, but unable to evaluate the information because they've
not read anything more.

The first time I saw mention of wikipedia, someone had pointed to the
entry for Don Lancaster's TV Typewriter. But for some reason, someone
missed the early details, just had information from the second book (where
he jammed NOPs into a CPU so it would advance the address counter and thus
cycle through memory). But someone didn't know that there was the earlier
method with counters and all that, so they couldn't question what was
missing or wrong. I said "but that's not complete" and detailed why. A
couple of days later, someone had fixed the entry.

Of course, some of the errors come because there's not enough unifying.
My great, great, great grandfather has an entry, it mentions one of the
children being married to another entry, but in that entry for the
husband, it gets the ancestry wrong, and I don't think the husband has a
link to my ancestor. Two entries that have different information should
indicate something is wrong, but if nobody looks at both entries (and they
might not know of the other entry, or the connection) then they'll
never know one has bad information.

Michael
 
"dave" <ricketzz@earthlink.net>


Fuck off - TENTH wit TROLL !!
 
On Wed, 22 Jan 2014 17:17:41 -0800, "William Sommerwerck"
<grizzledgeezer@comcast.net> wrote:

"Phil Allison" wrote in message news:bkb5slFclr1U1@mid.individual.net...

** And Wiki says otherwise:
http://en.wikipedia.org/wiki/Electronic_component

Wikipedia is wrong.
Click to expand...
In 2013 Wikipedia was compared to a major printed encyclopedia (I
don't remember which right now) and the percentage of errors was
pretty much the same for both. This is not to say that the errors were
the same or on the same subject or in any other way related except
that they were errors. The point is that they both contain errors. So
William could indeed be correct when he says that Wikipedia is wrong.
If that is truly the case then I think it would be a good thing if he
corrected the Wikipedia article and used references to back up the
correction. I really appreciate all the time folks have spent, and
continue to spend, on entries to Wikipedia. It is obvious that many
people have spent many hours researching, documenting, and writing for
Wikipedia and all this effort is unpaid. Since I have so far not been
able to contribute any information to Wikipedia my only recourse has
been to contribut cash. I hope William has the time and inclination to
correct the errors he has seen on this subject in Wikipedia.
Eric

---
This email is free from viruses and malware because avast! Antivirus protection is active.
http://www.avast.com
 
"William Sommerwanker = Retard, Autistic and Lunatic."



** Get cancer and die - you stinking nut case.
 
On 01/22/2014 04:25 PM, Phil Allison wrote:
"dave"

A diode is not an active device.


** Most sources say it is classed as one.

Then explain the Gunn Diode. DC in, RF out. How about LEDs? DC in,
Photons out.


http://www.allaboutcircuits.com/vol_3/chpt_1/2.html


** And Wiki says otherwise:

http://en.wikipedia.org/wiki/Electronic_component


Semiconductors and vacuum tubes are automatically "active devices".

So that includes solid state and vacuum diodes too.



.... Phil
Click to expand...

Wiki is the style of the reference. It doesn't really speak. Many things
oscillate when excited but they don't control anything. Is a quartz
crystal an active device?
 
dave wrote:
On 01/21/2014 03:04 PM, Michael A. Terrell wrote:

dave wrote:

On 01/21/2014 07:24 AM, Mike Tomlinson wrote:
In article <v22pd9hm1r5br9004o4o22dg4052p3tcdm@4ax.com>, Jeff Liebermann
jeffl@cruzio.com> writes

http://www.learnbydestroying.com/jeffl/crud/asus-k501j.jpg
The "hole" in the burnt out component is characteristic of applying
reverse polarity to an active device such as a diode. I would guess
that the diode exploded, blowing the top off the epoxy package.

The 8-pin IC next to it also looks burnt.

To the OP: forget it, this is not economically repairable. Buy your
daughter a new machine and use the correct charger in future.


A diode is not an active device.


Then explain the Gunn Diode. DC in, RF out. How about LEDs? DC in,
Photons out.



An active device is any type of circuit component with the ability to
electrically control electron flow (electricity controlling
electricity). In order for a circuit to be properly called electronic,
it must contain at least one active device. Components incapable of
controlling current by means of another electrical signal are called
passive devices. Resistors, capacitors, inductors, transformers, and
even diodes are all considered passive devices.

http://www.allaboutcircuits.com/vol_3/chpt_1/2.html
Click to expand...

How does the Gunn diode oscillate without gain? How does it have
gain, if it isn't an active component?


--
Anyone wanting to run for any political office in the US should have to
have a DD214, and a honorable discharge.
 
dave wrote:
Wiki is the style of the reference. It doesn't really speak. Many things
oscillate when excited but they don't control anything. Is a quartz
crystal an active device?
Click to expand...

No. It needs external gain, and an initial shock to start the
oscillation. That is usually supplied by the power up delay as the gain
block starts to function.


--
Anyone wanting to run for any political office in the US should have to
have a DD214, and a honorable discharge.
 
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